Protection device in looms



April 1939- w. H. BAKER 2,154,802

PROTECTION DEVICE IN LOOMS Filed Oct. 51, 1935 3 Sheets-Sheet l INVENTOR.

April 18, 1939. w H BAKER 2,154,802

PROTECTION DEVICE IN LOOMS Filed Oct. 31, 1935 3 Sheets-Sheet 2 INVENI'I'OR.

April 1939- w. H. BAKER I 2,154,802

PROTECTION DEVICE IN LOOMS Filed Oct. 31, 1955 3Sh68tS-Sh69t 3 1N VEN TOR.

Patented Apr. 18, 1939 -UNITED STATES PATENT 2,154,892 I v PROTECTION DEVICE'IN 'tooMs William H. Baker, Montreal, Quebec, Canada Application October 31, 1935, Serial No. 47,625

1 Claim.

This invention relates to 'an auxiliary protector in looms wherein the supply of weft in the running shuttles is automatically replenished upon substantial exhaustion thereof, and more particularly to the type of weft replenishing mechanism disclosed in my pending application for Letters Patent Serial Number 652,343 filed January 18, 1933.

This invention is designed to actuate the stopping of the loom through the brake mechanism if a shuttle boxes improperly on the magazine side of the loom, and in so doing prevents the loom from progressing to the point where the transfer of the bobbin is effected, thereby forml5 ing a preferred revoking device.

In the preferred form shown this protector is designed to operate on a loom equipped with a plurality of shuttle boxes and operating a plurality of shuttles arranged as an automatic weft replenishing loom, with a bobbin supply equipment positioned adjacent one set of shuttle boxes in such a manner that the bobbin is changed while the shuttle is in one box and the other shuttle box is unoccupied, the empty or spent bobbin being ejected from the loom through the empty shuttle box.

In these aforesaid looms it has been found that occasionally a spent bobbin is trapped in the empty shuttle box during the process of transfer,

0 blocking the entry of the incoming shuttle thereby damaging the loom or the cloth. To overcome this defect I have devised the auxiliary protector herein described which eflectively stops the loom when this condition arises, or if for any other reason a shuttle should fail to box properly.

It will be noted that this device acts in conjunction with the brake mechanism. This arrangement is conducive of almost instant cessation of the looms activity thereby preventing damage to the cloth or the loom parts.

My invention further relates to arrangements and combinations of parts which are hereinafter described and more particularly pointed out in the claim.

A preferred form of the invention is shown in the drawings in which;-

Fig. 1 is an end view of a fragment of a loom showing parts of the auxiliary protector in normal or running position.

Fig. 2 is like Fig. 1 showing a misplaced shuttle and the parts in abnormal or stopping position.

Fig. 3 is a front view with the brake and loom stopping mechanism on the right hand side of the loom.

Fig. 4 is like Fig.3 showing the brake and loom mechanism on the left hand side of the loom.

Fig. 5 is a detail showing the spring relief to protect the parts from damage.

Fig. 6 is a plan view of Fig. 5.

Referring more particularly to the drawings Figs. 1-2 and 3, I is the loom frame, 2 designates the lay, 3 is the shipper handle, 4 the knock-off lever, 5 the brake operating lever, B the spring which holds the lever 5 against the 10 detent I, where it is held in running position by the notch 8 in the lever 5. The pin 8a transmits the urge from the knock-off lever 4 to the brake operating lever 5 all well known in the art. 9 is the feeler bar of the new auxiliary protector which is mounted to extend into the shuttle box to feel for .a misplaced shuttle II] as the lay approaches the front center while the loom is operating. I I is an upright lever having an adjustable support for the feeler bar 9. l3 and I4 20 are bearings at one or both sides of the front of the loom to support the shaft I5, which carries movement derived from the feeler bar 9 when the same contacts with a misplaced shuttle. A depending arm I6 is mounted on the shaft I5 and adjustably connected to the push link H, which is arranged to fit over and move the knock-off lever 4, which in turn moves the pin 8a to operate the loom stopping means and apply the brake. I8 is an adjustable guide Figs. 1-2 and 6 to guide the shuttle feeler 9 to the correct position to contact a misplaced shuttle. Referring again to the brake operating lever 5, this lever is held at the top by a slotted bracket 20 which forms a sort of bunter through which the knock-off lever 4 can push the brake operating lever 5, through the medium of the pin 8a out from under the projection or detent I allowing the spring (not shown) of well known construc- 40 tion to apply the brake and stop the loom immediately, due to the auxiliary protector operating the brake operating lever 5 rather than the shipper handle 3, thereby producing a quicker stop and preventing damage to the loom or the 45 fabric.

Referring especially to the construction shown in Figs. 5 and 6, the upright lever I I is yieldingly mounted on the shaft I5, and is held from turning movement relative to said shaft in one direc- 50 tion by the cross pin ZI, and in the other direction by the dovetailed collar 22 and the spring 23, which in turn is fastened to the shaft by the collar 24.

The description to this point covers the as- 55 sembly of parts where the brake operating lever is located On the right hand side of the loom.

Fig. 4 in the accompanying drawings illustrates the assembly of the parts when the brake operating lever is found on the left hand side of the loom, and consists simply in extending the shaft I5 across the front of the loom and assembling the arm l6 and the link I1 on the left hand side of the loom in relation to the knock-off lever A there located. The pin 8a, which is also present when the brake is operated from this side of the loom completes the assembly.

The operation of the auxiliary protector is as follows: Fig. 1 shows the lay at the front center after the arrival of a properly placed shuttle, and the box motion has moved the shuttle box containing the shuttle away from the race and the feeler bar in normal operation. Figs. 2 and 6 show the shuttle improperly boxed or misplaced causing the feeler bar to contact the shuttle and stop the loom before the lay has reached the front center. This stop was effected by the feeler bar 9 pushing the upright lever II toward the front of the loom, thus rotating the shaft l5 slightly causing the depending arm I6, which is fastened to it, to thrust the link I! against the knock-off lever 4 which in turn pushes the pin 8a against the brake operating lever 5 and the loom is immediately stopped.

To replace the parts to normal or operating position it is only necessary to box the misplaced shuttle properly, and depress the usual brake operating pedal (not shown) and the dropping back of the brake lever 5 through the spring 6 will push the pin 8a against the knock-oil lever 4 and this lever will in turn move the link I! fulcrumed on the arm l6 which is mounted on the shaft l5 moving the upright lever II and the feeler bar 9 of the auxiliary protector and all the parts are replaced to normal or operating position.

In some looms the available space in the bracket 20 Figs. 1 and 2 in which the brake operating lever and the spring reside is insuflicient when this protector is introduced, thereby restricting the necessary movement of the pin 8a. To overcome this the spring relief as shown in Figs. 5 and 6 is employed. Referring to Fig. 2 the crossing of the lines on the shuttle ID, to designate the position of the shuttle tip 25 will show the difference in distance that the feeler bar 9 has to move to set the brake operating lever when the contact is made at the side rather than the tip of the shuttle. In this figure the feeler bar 9 is shown contacting the side of a misplaced shuttle. During this contact, and with a limited space in the bracket 20 Figs. 5 and 6 for movement of the pin 8a, it is obvious that the spring relief mechanism must be employed to prevent cramping of the parts or the crushing of the shuttle. The thrust from the feeler bar 9 is absorbed by the spring 23 held by the retaining collar 24 on the shaft l5.

Having thus described my invention. what I claim is:

In a loom in combination with a shuttle feeler bar and a brake lever, of mechanism interposed between said feeler bar and brake lever to absorb the excess thrust of said feeler bar during the actuation thereof comprising a shaft, a supporting member therefor, a cross pin on said shaft, a feeler bar connection on said shaft and movably associated with said pin, a tension device on said shaft to urge said connection against said pin, and means associated with said mechanism to transmit movement of said feeler bar to said brake lever.

WILLIAM H. BAKER. 

